Pete Davidson and Jon Stewart in early September, has since become a full-fledged tour for John Mulaney.The five-time “Saturday Night Live” host just announced an additional 18 shows to his 2023 calendar he’s calling ‘John Mulaney: In Concert.’In total, Mulaney now has 31 gigs all over North America this year including a trio with Jon Stewart and 11 with Pete Davidson.And for those keeping score at home, he now has four shows in New York State.First up, he’s slated to co-headline with Jon Stewart at Westbury’s NYCB Theatre on Friday, Oct. 13 and Saturday, Oct.